GNU Patch up to 2.7.6 Symlink inp.c link following

CVSS Meta Temp Score
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CTI Interest Score
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5.6$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in GNU Patch up to 2.7.6. This issue affects some unknown processing of the file inp.c of the component Symlink Handler. The manipulation leads to link following. This vulnerability is listed as CVE-2019-13636. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in GNU Patch up to 2.7.6 and classified as critical. This issue affects some unknown processing of the file inp.c of the component Symlink Handler. The manipulation with an unknown input leads to a link following vulnerability. Using CWE to declare the problem leads to CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In GNU patch through 2.7.6, the following of symlinks is mishandled in certain cases other than input files. This affects inp.c and util.c.

The weakness was presented 07/17/2019 (Website). It is possible to read the advisory at seclists.org. The identification of this vulnerability is CVE-2019-13636 since 07/17/2019. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 236656 (Alibaba Cloud Linux 3 : 0056: patch (ALINUX3-SA-2022:0056)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (236656). See VDB-138849 for similar entry. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.6

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Link following
CWE: CWE-59
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 236656
Nessus Name: Alibaba Cloud Linux 3 : 0056: patch (ALINUX3-SA-2022:0056)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: git.savannah.gnu.org

Timelineinfo

07/17/2019 🔍
07/17/2019 +0 days 🔍
07/18/2019 +1 days 🔍
05/18/2025 +2131 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: 154124
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2019-13636 (🔍)
GCVE (CVE): GCVE-0-2019-13636
GCVE (VulDB): GCVE-100-138263
See also: 🔍

Entryinfo

Created: 07/18/2019 08:39
Updated: 05/18/2025 20:31
Changes: 07/18/2019 08:39 (55), 07/08/2020 09:29 (2), 11/01/2023 11:37 (4), 11/01/2023 11:45 (1), 05/18/2025 20:31 (22)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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